EP1788423A4 - Backlight device and color liquid crystal display device - Google Patents

Backlight device and color liquid crystal display device

Info

Publication number
EP1788423A4
EP1788423A4 EP05770536A EP05770536A EP1788423A4 EP 1788423 A4 EP1788423 A4 EP 1788423A4 EP 05770536 A EP05770536 A EP 05770536A EP 05770536 A EP05770536 A EP 05770536A EP 1788423 A4 EP1788423 A4 EP 1788423A4
Authority
EP
European Patent Office
Prior art keywords
light
color light
color
liquid crystal
crystal display
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP05770536A
Other languages
German (de)
French (fr)
Japanese (ja)
Other versions
EP1788423A1 (en
Inventor
Shuichi Haga
Koichiro Kakinuma
Takehiro Nakatsue
Tatsuhiko Matsumoto
Yasuhiro Tagawa
Yutaka Ota
Takashi Oku
Takeo Arai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=35907405&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1788423(A4) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sony Corp filed Critical Sony Corp
Publication of EP1788423A1 publication Critical patent/EP1788423A1/en
Publication of EP1788423A4 publication Critical patent/EP1788423A4/en
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133624—Illuminating devices characterised by their spectral emissions

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

There is provided a backlight device used in a color liquid crystal display device (LCD). The backlight device generates white light by mixing red light, green light, and blue light generated from a light source including a red color light emitting diode (21R) emitting red color light having a half value width hwr: 15 nm ≤ hwr ≤ 30 nm, a green color light emitting diode (21G) emitting green color light having a half value width hwg: 25 nm ≤ hwg ≤ 50 nm, and a blue color light emitting diode (21B) emitting blue color light having a half value width hwb: 15 nm ≤ hwb ≤ 30 nm. The white color light is applied from the rear side of a transmittance type color liquid crystal display panel (10) including a color filter (19) having three primary color filters for wavelength-selectively transmitting red color light, green color light, and blue color light.
EP05770536A 2004-08-18 2005-08-09 Backlight device and color liquid crystal display device Ceased EP1788423A4 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2004238789 2004-08-18
JP2004238787 2004-08-18
JP2005075500 2005-03-16
PCT/JP2005/014599 WO2006019016A1 (en) 2004-08-18 2005-08-09 Backlight device and color liquid crystal display device

Publications (2)

Publication Number Publication Date
EP1788423A1 EP1788423A1 (en) 2007-05-23
EP1788423A4 true EP1788423A4 (en) 2008-02-27

Family

ID=35907405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05770536A Ceased EP1788423A4 (en) 2004-08-18 2005-08-09 Backlight device and color liquid crystal display device

Country Status (6)

Country Link
US (1) US7663714B2 (en)
EP (1) EP1788423A4 (en)
JP (1) JPWO2006019016A1 (en)
KR (1) KR20070043007A (en)
TW (1) TW200617525A (en)
WO (1) WO2006019016A1 (en)

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US7355780B2 (en) * 2004-09-27 2008-04-08 Idc, Llc System and method of illuminating interferometric modulators using backlighting
US7561323B2 (en) * 2004-09-27 2009-07-14 Idc, Llc Optical films for directing light towards active areas of displays
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Also Published As

Publication number Publication date
WO2006019016A1 (en) 2006-02-23
TWI332102B (en) 2010-10-21
KR20070043007A (en) 2007-04-24
EP1788423A1 (en) 2007-05-23
US7663714B2 (en) 2010-02-16
JPWO2006019016A1 (en) 2008-05-08
TW200617525A (en) 2006-06-01
US20070182887A1 (en) 2007-08-09

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